readpage() implmentations zero out part of the page-cache page mapping a
file hole. This commit adds a call back to "struct fsverity_operations"
which readpage() can invoke to verify the file hole.
Signed-off-by: Chandan Rajendra <chandan@xxxxxxxxxxxxx>
---
fs/ext4/super.c | 1 +
include/linux/fsverity.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 4493ddc357c6..94e0d4b56653 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1459,6 +1459,7 @@ static const struct fsverity_operations ext4_verityops = {
.read_metadata_page = ext4_read_verity_metadata_page,
.verity_required = ext4_verity_required,
.readpage_limit = ext4_readpage_limit,
+ .check_hole = fsverity_check_hole,
};
#endif /* CONFIG_FS_VERITY */
diff --git a/include/linux/fsverity.h b/include/linux/fsverity.h
index fc8113acbbfe..8bc28b07d550 100644
--- a/include/linux/fsverity.h
+++ b/include/linux/fsverity.h
@@ -20,6 +20,7 @@ struct fsverity_operations {
struct page *(*read_metadata_page)(struct inode *inode, pgoff_t index);
bool (*verity_required)(struct inode *inode, pgoff_t index);
loff_t (*readpage_limit)(struct inode *inode);
+ bool (*check_hole)(struct inode *inode, struct page *page);
};
#ifdef CONFIG_FS_VERITY
--
2.19.1
